Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

UC540 configuring CM list/tftp timeout


I have a UC540 + 2 x 7937 phones with almost default config. I removed the firewall part from the UC540, the rest is at default.

If i connect the phones to the internal switch ports, they work well.... i can make internal calls.

I configured an ip address on the fe 0/0 of the UC540 with ip address

I installed IP Comm on my laptop and cofigured it with tftp

I can call the the two7937 phones, everything is working.

I take one 7937 and disable dhcp, configure an ip address from the subnet,and the tftp server

When the phone boots it stays a long time in configuring CM list then tftp timeout.

From the phone i can ping the UC540 and from the UC540 the phone.

What is the problem here?

Thank you,


Cisco Employee

Re: UC540 configuring CM list/tftp timeout


It sounds like the phone's TFTP request may not be making it to the CME IP address.

Run 'debug tftp events' and see if you see the TFTP request for the phone config file.  That should shed some light on where in the process the registration is breaking down.

Also, make sure that you don't have TFTP bound to a different interface than you are manually specifying on the phone.